sir, i am working on ARM CORTEX M4 architecture over serial wire debug protocol,i got IDCODE(2ba01477) as per arm technical reference manual,when i am writing 0x50000000 into CTRLSTAT register i got ACK success,but the thing is when I am trying to read CTRLSTAT register after writing i got 0xffffffff instead of 0xf0000000 i don't getting where the problem might be?? Could you Please suggest me where would be the porblem??